445589869 has 2 divisors, whose sum is σ = 445589870. Its totient is φ = 445589868.

The previous prime is 445589863. The next prime is 445589909. The reversal of 445589869 is 968985544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422836969 + 22752900 = 20563^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 445589869 - 2³ = 445589861 is a prime.

It is a super-2 number, since 2×445589869² = 397100662710874322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445589861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222794934 + 222794935.

It is an arithmetic number, because the mean of its divisors is an integer number (222794935).

Almost surely, 2^445589869 is an apocalyptic number.

It is an amenable number.

445589869 is a deficient number, since it is larger than the sum of its proper divisors (1).

445589869 is an equidigital number, since it uses as much as digits as its factorization.

445589869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12441600, while the sum is 58.

The square root of 445589869 is about 21108.9997157610. Note that the first 3 decimals coincide. The cubic root of 445589869 is about 763.7978578768.

The spelling of 445589869 in words is "four hundred forty-five million, five hundred eighty-nine thousand, eight hundred sixty-nine".